/Engine/Source/Editor/UnrealEd/Classes/ThumbnailRendering/SlateBrushThumbnailRenderer.h
void CreateTextureThumbnailOnCanvas ( int32 X, int32 Y, uint32 Width, uint32 Height, [FRenderTarget](API\Runtime\Engine\FRenderTarget) * RenderTarget, [FSlateBrush](API\Runtime\SlateCore\Styling\FSlateBrush) & Brush, [FCanvas](API\Runtime\Engine\FCanvas) * Canvas, [UTexture2D](API\Runtime\Engine\Engine\UTexture2D) * Texture )